Hey - there may be something to recommend -
My mate was a college cheerleader (funny when you consider the college) - and I think (considering your conversation) it may have something to do with her comfort level.

Now- I'm no 10+ inches (8 here) but I've had GF's of similar stature with far less 'desire' than this wonderful woman.
And, thinking back, only one of my former GF's without such physical activities (swimming, running, gymnastics...) had a comfort level for my size with any frequency...

Now, you may have found something to do with how often we do it.